JP2007030724A - Damper unit and air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper unit which has high shutoff performance of an outside air intake port. <P>SOLUTION: The damper unit 20 is provided with dampers 23a, 23b which open/close by switching to inside air intake ports 21a, 21b and the outside air intake ports 22a, 22b with respective opened areas smaller than those of the inside air intake ports 21a, 21b. The outside air intake ports 22a, 22b are deflectedly arranged at the adjacent side of adjacently arranged damper cases 26a, 26b. Adjacent sides 23n are driven by an actuator 50 arranged between the damper cases 26a, 26b in the dampers 23a, 23b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a damper unit capable of switching at least part of intake air between inside air and outside air, and an air conditioner using the same.

Patent Document 1 discloses a vehicle air conditioner in which at least a part of an air conditioning system including a condenser, an evaporator, and the like is installed on the ceiling (on the roof) of a bus body.
JP 2001-71738 A

  Many air conditioning systems can be switched between a system that circulates air inside the vehicle and a system that introduces air outside the vehicle in response to requests such as obtaining cold air efficiently or introducing fresh air. . Such switching of the system is performed by switching the input source of the air supplied to the evaporator between the outside of the vehicle and the inside of the vehicle by a damper. The indoor / outdoor switching damper is required to be able to counter the outdoor wind pressure, particularly, the wind pressure (ram pressure) during traveling in an in-vehicle air conditioner. That is, the pressure inside the chamber is substantially constant and the differential pressure with the evaporator unit is not so high, whereas the outdoor pressure fluctuates, and the differential pressure with the evaporator unit may increase, A certain deadline performance is required under certain conditions.

  One aspect of the present invention is a damper unit that can switch in and out of indoor and outdoor air. The damper unit is configured to switch between an indoor air intake port communicating with the room and an outdoor air intake port connected to the outdoor to open and close the damper unit. An actuator for operating the offset side, and a case having an outside air intake port that is smaller than the internal air intake port and is disposed at a position shifted to the offset side where the damper is operated.

  The damper that closes the outside air intake is required to be able to withstand the differential pressure, and therefore, it is required to increase the mechanical strength of the damper. In order to operate a heavy damper with high mechanical strength, the actuator can output a force to operate the heavy damper in addition to a force that presses against the outside air intake with a sufficient pressure that can counter the differential pressure with the outside. Things are required.

  In order to open and close the intake port, a damper having an area larger than the area of the intake port is necessary. For example, a damper having a very large area, for example, about twice the area of the intake port When the intake port is closed, the area contributing to the seal increases, so that the cutoff performance increases with respect to the pressure pressing the damper against the intake port. However, a damper having an area that is too large with respect to the opening cannot be employed in terms of space efficiency, economy, and performance of the actuator.

  A damper unit according to an aspect of the present invention includes a damper for switching between an inside air intake port communicating with a room and an outside air intake port communicating with the outside. And, compared with the inside air intake, the outside air intake often has a larger differential pressure. Therefore, even if the area of the outside air inlet is made smaller than the inside air inlet, the differential pressure is large, so that the same suction ability can be obtained. And the sealing performance improves by using the damper of the area which opens and closes an internal air intake with a large area in order to open and close an external air intake with a small area. In addition, the damper having a very large area with respect to the outside air intake is a damper having an area required for opening and closing the inside air intake, so that it does not become an excessive facility.

  Further, by reducing the area of the intake with respect to the area of the damper, the position of the outside air intake with respect to the damper can be arranged on a biased or offset side. The offset side and the side on which the damper is driven by the actuator can be matched. Accordingly, by driving the side where the damper is offset, the outside air intake can be closed with sufficient force, and the output of the actuator can be suppressed. Furthermore, by shifting the outside air intake to the side where the damper is operated, the damper is not operated, that is, in a region where it is difficult to obtain the sealing performance with the driving force, a large area contributing to sealing can be secured. Thereby, sealing performance can be secured.

  In the case of a swivel type in which the damper moves between the inside air intake port and the outside air intake port by swirling, the actuator operates only on the side away from the swivel center of the damper on the side where the damper is offset, and the A damper unit with high sealing performance can be provided.

  One aspect of the present invention is a damper unit that can switch in and out of indoor and outdoor air. The damper unit communicates indoors with two indoor air intakes arranged side by side, and communicates with the outside and two outdoor airs arranged side by side. In order to open and close by switching the intake port, two side-by-side dampers, an actuator for operating the adjacent sides of these two dampers, and a position that is smaller than the internal air intake port and shifted to the adjacent side of the damper A damper unit having a case with an outside air inlet disposed in

  By making the positions of the outside air intake ports with respect to the respective dampers symmetrical, the adjacent sides of the two dampers can be operated as the offset sides of the respective dampers by an actuator common to these dampers. Therefore, in each of the plurality of dampers driven by the common actuator, it is possible to obtain a good sealing performance at the outside air intake port with a simple configuration like the above-described damper unit.

  One aspect of the present invention is an air conditioner having the above-described damper unit and a heat exchange unit that adjusts the temperature of air sucked from the inside air inlet and / or the outside air inlet through the damper unit and supplies the air into the room. It is. With a compact configuration, good sealing performance at the outside air intake can be obtained. Therefore, it is suitable for an in-vehicle air conditioner having an air conditioner cover for mounting on a vehicle roof including a damper unit and a heat exchange unit.

  Moreover, these dampers may be provided as a damper unit, or may be incorporated in the air conditioner. That is, an aspect of the present invention is an air conditioner that can switch in and take in indoor air and outdoor air. The air conditioner communicates with the room, two indoor air inlets arranged side by side, and communicates with the outside. To switch between two open air intakes, the two side by side dampers, the actuator for operating the adjacent side of these two dampers, and the internal air intake are smaller and adjacent to the dampers. An air conditioner having a case provided with an outside air inlet arranged at a position shifted to the side, and a heat exchange unit for adjusting the temperature of the air sucked from the inside air inlet and / or the outside air inlet and supplying the air into the room is there.

  FIG. 1 shows a state where an air conditioner is mounted on the roof (ceiling) of a bus. The air conditioner 10 includes a condenser unit 11 including a condenser and an evaporator unit 12 including an evaporator, and these units 11 and 12 are disposed on the front and back of the roof (ceiling) 2 of the bus 1. This system is called a ceiling mounted bus air conditioner. A compressor (not shown) for circulating a refrigerant in a refrigeration cycle including a condenser and an evaporator is mounted on an engine portion at the rear of the vehicle body in order to drive the engine. The units 11 and 12 mounted on the roof 2 are packaged by being covered with an air conditioner cover 14, and the air conditioner 10 is also an in-vehicle package type air conditioner. The air conditioner cover 14 is further covered with the roof cover 15 or connected to the roof cover 15 so that an external appearance with a sense of unity can be obtained as the upper structure of the roof 2. In the following, the roof 2 is a wall body that can support structures on the roof including the air conditioner 10, the roof cover 15, and the like, and forms a boundary between the indoor (indoor) and the outdoor (outdoor). A member or structure that also serves as a ceiling is shown.

  FIG. 2 shows a state in which air whose temperature has been adjusted by the air conditioner 10 mounted on the roof 2 of the bus 1 is supplied to the interior 4 of the bus 1. The air conditioner 10 uses the evaporator 13 included in the evaporator unit 12 as a heat exchange unit, and supplies the outside air A sucked from the outdoor 5 and / or the inside air B sucked from the indoor 4 to the indoor 4 by adjusting the temperature by the evaporator 13. To do. The temperature-controlled air C is first supplied to a supply duct 6 extending in the front-rear direction of the vehicle along the windows on both sides of the vehicle interior 4, and blown out from the plurality of air outlets 6 a to the vehicle interior 4 through the duct 6. . Therefore, the evaporator unit 12 includes a plurality of evaporators 13 arranged at symmetrical positions, and the evaporator unit 12 is designed to be divided into symmetrically arranged units.

  FIG. 3 is a cross-sectional view showing a schematic configuration of the left evaporator unit 12 as viewed from the front of the bus 1. The evaporator unit 12 is temperature-adjusted by a damper unit 20 for switching the direction of intake air between outdoor and indoor by a damper 23, and an evaporator (heat exchange unit) 13 for adjusting the temperature of the outside air A and / or the inside air B. And a blower 17 for supplying the air C to the supply duct 6 in the room 4 through the air outlet 18. The damper unit 20, the evaporator 13, and the blower 17 are covered with an air conditioner cover 14 that is lined with a heat insulating material 16, and an air path 30 for cooling the air sucked from the room 4 or the outside 5 and returning it to the room 4. Is formed.

  4 and 5 show an enlarged configuration of the damper unit 20 and the vicinity thereof. 4 shows a state in which the outside air A is selected by the damper 23, and FIG. 5 shows a state in which the inside air B is selected by the damper 23. As shown in FIGS. 6 and 7, the basic configuration of the damper unit 20 is such that the damper 23 and other accessories can be assembled using the damper case 26 as a base. 6 is a perspective view of the damper case 26 as viewed from the damper 23 side (inside the room), and FIG. 7 is a perspective view of the damper case 26 as viewed from the outdoor side. As will be described later, the damper unit 20 of the evaporator unit 12 includes two symmetrically arranged damper cases 26 arranged side by side. FIGS. 4 and 5 are representative of the configuration of one damper case 26. As shown.

  The damper unit 20 is installed on the roof 2 which is a partition wall that partitions the interior and the exterior. Accordingly, the damper unit 20 is an outdoor type damper unit that is mounted on the outdoor 5 side with the roof 2 interposed therebetween with respect to the indoor 4 side. The damper case 26 is provided with a substantially triangular side wall 26s, and the vertex 26t is directed to the roof 2 and the opposite upper side 26u is directed to the air conditioner cover 14 so as to penetrate the roof 2. It is installed in the vicinity of the provided inside air inlet 21. The damper case 26 and the air conditioner cover 14 form a chamber 29 having a substantially triangular cross section for taking in the outside air A. The portion of the chamber 29 facing the inside air inlet 21 becomes the outside air inlet 22 communicating with the outdoor 5, and the outside air filter 25 is installed in the portion facing the roof 2 on the opposite side and passes through the outside air filter 25. Outside air A is supplied to the air path 30 of the air conditioner (air conditioner unit) 10.

  The damper unit 20 includes a damper 23 that pivots between an inside air inlet 21 and an outside air inlet 22 around a shaft 23 s disposed on the apex 26 t side of the damper case 26. The inside air inlet 21 communicates with the room 4 and is open so as to suck air from the room 4, and the outside air inlet 22 communicates with the outside 5 and opens so as to suck air from the outside 5. Therefore, as shown in FIG. 4, when the damper 23 is turned toward the inside air inlet 21 to close the inside air inlet 21, the outside air inlet 22 is opened, the outside air A is selected, and the outside air A enters the air path 30. Supplied. On the other hand, as shown in FIG. 5, when the damper 23 is turned toward the outside air inlet 22 to close the outside air inlet 22, the inside air inlet 21 is opened, the inside air B is selected, and the inside air B enters the air path 30. Supplied. The damper 23 includes a damper plate 23p for closing the intake ports 21 and 22, and an arm 23g extending from both ends of the damper plate 23p toward the shaft 23s.

  In FIG. 8, the structure of the damper unit 20 of the evaporator unit 12 is extracted and shown. FIG. 8A shows a state in which the outside air A is taken in, and FIG. 8B shows a state in which the inside air B is taken in. The evaporator unit 12 includes two internal air inlets 21a and 21b arranged side by side on the roof 2, damper cases 26a and 26b arranged side by side so as to correspond to these, And an actuator 50 disposed between the damper cases 26a and 26b. A motor is employed as the actuator 50, but any actuator that can drive the damper plate 23p, such as a solenoid or a cylinder, can be employed.

  In each of the damper cases 26 a and 26 b, outside air intake ports 22 a and 22 b having an area about half that of the surface 27 to be opened and closed are symmetrically positioned on the surface 27 opened and closed by the dampers 23 a and 23 b. Has been placed. Therefore, with respect to the dampers 23a and 23b attached to the cases 26a and 26b, the outside air intake ports 22a and 22b are arranged at positions shifted to the adjacent sides with the actuator 50 interposed therebetween.

  A link 51 for driving the damper plate 23p from the actuator 50 is connected to a side 23n adjacent to the damper plate 23p of each of the dampers 23a and 23b at a position away from the shaft 23s that is the rotation center. In each damper 23a and 23b, the adjacent side 23n of each damper plate 23p is driven not by the center of the damper plate 23p but by the actuator 50 disposed between the dampers 23a and 23b. Therefore, in the damper unit 20, the actuator 50 applies a force to the dampers 23a and 23b at the offset position 23n, and the outside air intake ports 22a and 22b are offset to the side where the driving force is applied to the dampers 23a and 23b. Be placed. The dampers 23a and 23b are driven synchronously by the common actuator 50 via the link 51, move between the inside air inlets 21a and 21b and the outside air inlets 22a and 22b, and switch them to close. The bus air conditioner 10 is switched between a mode in which the air conditioner 10 is air-conditioned by the outside air A and a mode in which the air conditioner B is air-conditioned.

  The opening area of the outside air inlets 22a and 22b of the evaporator unit 12 is about half of the opening area of the inside air inlets 21a and 21b. A ram pressure due to traveling is applied to the outside air inlets 22a and 22b communicating with the outdoor 5. For this reason, compared with the inside air inlets 21a and 21b, the differential pressure with the air path 30 is usually large, and sufficient outside air A required for air conditioning can be taken in even if the opening area of the inlet is small. In addition, when noise or vibration is generated by the airflow at the inside air inlets 21 a and 21 b opened to the room 4, it is directly propagated to the room 4. On the other hand, the outside air intake ports 22a and 22b are arranged on the roof 2, and when the outside air intake ports 22a and 22b are opened to suck in the outside air A, the inside air intake ports 21a and 21b are connected to the dampers 23a and 21b. It is closed by 23b. Therefore, even if the flow rate of air passing through the outside air inlets 22a and 22b is high and noise or vibration is more likely to occur compared to the inside air inlets 21a and 21b, they directly affect the interior 4 of the room. Never give.

  Therefore, the area of the outside air inlets 22a and 22b can be made smaller than the inside air inlets 21a and 21b without degrading the performance of the bus air conditioner 10. The area ratio between the outside air inlets 22a and 22b and the inside air inlets 21a and 21b is not limited to 1: 2, but the air required for the ram pressure, air conditioning or ventilation expected at the outside air inlets 22a and 22b. It varies depending on conditions such as quantity.

  As shown in FIG. 8A, the plates 23p of the dampers 23a and 23b have an area capable of closing the large-area inside air intake ports 21a and 21b. Therefore, as shown in FIG. 8B, when the outside air intake ports 22a and 22b having a small area are closed by the dampers 23a and 23b, the surfaces of the respective damper plates 23p do not face the outside air intake ports 22a and 22b. About half of the portion is in a state of being combined with the surfaces 27 of the damper cases 26a and 26b. Therefore, even if the damper plate 23p is not in close contact with the surfaces 27 of the damper cases 26a and 26b, a region with a small gap between the surfaces spreads around the outside air intake ports 22a and 22b, in which pressure loss Increases the sealing performance.

  Since the damper plate 23p is driven by the actuator 50 on the adjacent side 23n, a force is applied to the portion facing the outside air intake ports 22a and 22b arranged on the adjacent side of the damper cases 26a and 26b, and the outside air intake port 22a. And the plate 23p are easily brought into close contact with 22b. In particular, since the plate 23p is easily pressed against the adjacent side 23n of the outside air intake ports 22a and 22b close to the actuator 50, high sealing performance is easily obtained. Since the opposite sides of the outside air intake ports 22a and 22b are far from the actuator 50, it is difficult to strongly press the damper plate 23p. However, since the portion of the damper plate 23p far from the actuator 50 can secure a large area facing the surface 27 of the damper case 26, high sealing performance can be obtained even if the force pressing the damper plate 23p is weak as described above. it can. Therefore, as a whole, both the outside air intake ports 22a and 22b can be satisfactorily closed by the damper plate 23p.

  Furthermore, when trying to obtain a high sealing performance by closing an opening having a large area with a damper plate, it is important to reduce distortion and warpage of the damper plate 23p in order not to generate a gap between the opening and the plate. . For this purpose, a method of improving the mechanical strength of the damper plate by providing a rib or increasing the thickness of the plate is employed. However, when manufacturing a low-cost and light damper plate by resin molding, distortion may occur by thickening the plate or partially providing ribs. Therefore, it is required to obtain a high sealing performance with a slightly warped or distorted damper plate. Therefore, an actuator with a large driving force is adopted, or a complicated structure is used to apply an equal driving force to the damper plate. It is necessary to adopt a link.

  On the other hand, in the damper unit 20 of this example, the area of the outside air inlets 22a and 22b is smaller than the area of the damper plate 23p, so that the mechanical strength and shape accuracy required for the damper plate 23p are kept low. be able to. Furthermore, since the offset side 23n of the damper plate 23p only needs to be limitedly driven by the actuator 50, the two damper plates 23p can be connected and driven by the link 51 having a simple configuration. In particular, since it is a swing type damper plate 23p, the driving force can be efficiently transmitted to the damper plate 23p by driving the end of the damper plate 23p away from the shaft 23s, which is the center of rotation, via the link 51. On the side opposite to the link 51, the damper plate 23p and the surfaces 27 of the damper cases 26a and 26b are combined to obtain a sealing performance. Therefore, a high sealing performance can be obtained by the actuator 50 having a small driving force. . For this reason, it is possible to provide the air conditioner 10 having a high cut-off performance of the outside air intake ports 22a and 22b by the economical damper unit 20 with a simple configuration.

  The above-described configuration can be applied to an air conditioner mounted on the roof of a vehicle such as a train, a passenger car, or a truck, without being limited to the air conditioner mounted on the roof of the bus. Moreover, the above-described configuration can be applied not only to the vehicle but also to an air conditioner attached to a container, a roof of a residence, or an outer wall. Moreover, the type of damper in which the plate-like damper plate turns is most suitable for the above-described damper unit and an air conditioner equipped with the damper unit, but is not limited to the turning type. The damper plate may be arcuate or a type in which the damper plate moves in parallel.

The figure which shows the outline | summary of the air conditioner mounted in the ceiling of the bus. The figure which shows a mode that the temperature-controlled air is supplied by the bus air conditioner of FIG. Sectional drawing which shows schematic structure of the evaporator unit of a bus air conditioner. It is sectional drawing which shows operation | movement of a damper unit, and is a figure which shows the external air mode which introduces external air and air-conditions. It is sectional drawing which shows operation | movement of a damper unit, and is a figure which shows the indoor mode which introduces internal air and air-conditions. The perspective view which looked at the damper case from the damper side. The perspective view which looked at the damper case from the outside air filter side. 8A and 8B are diagrams illustrating a schematic configuration of a damper unit, in which FIG. 8A illustrates an outside air mode in which outside air A is introduced and air-conditioned, and FIG. 8B illustrates an indoor mode in which inside air B is introduced and air-conditioned.

Explanation of symbols

1 bus (vehicle), 2 roof, 4 indoors, 5 outdoor 10 air conditioner (bus air conditioner)
12 Evaporator unit, 13 Evaporator (Heat exchange unit)
14 Air conditioner cover 15 Roof cover 20 Damper unit 21a, b Inside air inlet (first opening), 22a, b Outside air inlet 23 Damper, 25 Outside air filter, 26 Damper case 50 Actuator, 51 Link

Claims (7)

A damper unit that can switch in and out of indoor air,
A damper for switching and opening and closing the inside air inlet communicating with the room and the outside air inlet communicating with the outside;
An actuator for operating the offset side of this damper,
A damper unit having a case that is smaller than the inside air intake and has the outside air intake arranged at a position shifted to the offset side where the damper is operated.   2. The damper unit according to claim 1, wherein the damper turns and moves between the inside air inlet and the outside air inlet, and the actuator operates a side away from the turning center of the damper. 3. A damper unit that can switch in and out of indoor air,
Two dampers arranged side by side in order to switch between the indoor air intakes arranged side by side and the two indoor air intakes arranged side by side and the outdoor air intakes arranged side by side
An actuator for operating the adjacent sides of these two dampers;
A damper unit having a case that is smaller than the inside air intake and includes the outside air intake arranged at a position shifted to the adjacent side of the damper.   4. The damper unit according to claim 3, wherein the damper turns and moves between the inside air inlet and the outside air inlet, and the actuator operates a side away from the turning center of the damper. The damper unit according to claim 1 or 3,
An air conditioner comprising: a heat exchange unit that adjusts the temperature of air sucked from the inside air inlet and / or the outside air inlet through the damper unit and supplies the air into the room. The damper unit according to claim 1 or 3,
A heat exchange unit for adjusting the temperature of the air sucked from the inside air inlet and / or the outside air inlet through the damper unit and supplying the air into the room;
An in-vehicle air conditioner having an air conditioner cover for mounting on a vehicle roof including the damper unit and the heat exchange unit. An air conditioner that can switch between indoor air and outdoor air,
Two dampers arranged side by side in order to switch between the indoor air intakes arranged side by side and the two indoor air intakes arranged side by side and the outdoor air intakes arranged side by side
An actuator for operating the adjacent sides of these two dampers;
A case provided with the outside air inlet disposed at a position that is smaller than the inside air inlet and shifted to the adjacent side of the damper;
An air conditioner comprising: a heat exchange unit that adjusts the temperature of air sucked from the inside air inlet and / or the outside air inlet and supplies the air into the room.

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